Write to tag from 7.9.21 to 8.1.42

Ignition
1

I am trying to write to a tag through the gateway network from a 7.9.21 gateway to a 8.1.42 gateway and I am getting the error

Error writing to test.Value: Exception occurred on remote machine, error code=GENERAL_PROTOCOL_EXCEPTION [100]

The tag is a memory tag on the 8.1.42 gateway with read only set to false. I have tried resetting the gateway network connection, saving the tag provider configuration, and also rebooting each of the gateway servers. Any ideas on what is causing this?

2

Compatibility issue. Pretty sure you can't write from 7.9x to 8.1x
You could set up messaging and write that way.

3

Hmm, I thought you could read and write, but not edit.

4

I've never had success writing, reads are fine.
Was a permissions issue with the GN and how it does remote permissions AFAIKR

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